具有相交性质的近小扭转映射的不变环面的保持性

In this paper we investigate the nearly small twist mappings with intersection property. With a certain non-degenerate condition, we proved that the most of invariant tori of the original small twist mappings will survive afer small perturtations. The persisted invariant tori are close to the unperturbed ones when the perturbation are small. The orbits reduced by those mappings are quasi-periodic in the invariant tori with the frequences closing to the original ones.     

一类二阶中立型差分方程正解的渐近稳定性

研究了下列二阶中立型差分方程Δ2[x(n)-px(n-τ)]+q(n)x(g(n))=0,n n0正解渐近趋向于零的充分条件.     

引入自我调节发展大学生数学思维的研究

自我调节学习是按照现代教育理论发展起来的一种教育实践活动.分析了其理论基础和发展现状,针对大学生思维发展中辩证思维占优势、创造思维呈上升趋势等显著特点,结合高等数学自身以动态为主,高容量、深广度,较初等数学有质的飞跃的事实,分析了高等数学与初等数学的思维差异,阐明了自我调节运用于高等数学课程教学中的可能性和必要性,并通过教学实验研究,从获得的第一手材料证实了自我调节手段运用于高等数学教学中的可行性,从而也表明了它是促进学生数学思维发展的强有力的工具.     

具拟周期摄动的近可积Hamiltonian系统的KAM型定理

In this paper we consider the persistence of invariant tori of an integrable Hamiltonian system with a quasiperiodic perturbation. It is proved that if the unperturbed system satisfies the Rtissmann non-degenerate condition and the perturbed system satisfies the co-linked non-resonant condition, then the majority of invariant tori is persistent under the perturbation.     

时间测度链上带有时滞的中立型动力方程的伪概周期解[英文]

本文研究时间测度链上伪概周期函数的性质.利用时间测度链上指数型二分性性质以及Banach不动点定理,我们得到时间测度链上带有时滞的中立型动力方程的伪概周期解存在性与唯一性的充分条件.并举例说明我们的结论     

Logistic型方程周期解和概周期解的存在性

In this paper, we study the Logistic type equation x= a（t）x -b（t）x^2＋ e（t）. Under the assumptions that e（t） is small enough and a（t）, b（t） are contained in some positive intervals, we prove that this equation has a positive bounded solution which is stable. Moreover, this solution is a periodic solution if a（t）, b（t） and e（t） are periodic functions, and this solution is an almost periodic solution if a（t）, b（t） and e（t） are almost periodic functions.